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Hi Andy Thanks for doing the experiments. But can you confirm pls - 1) On 10MHz (or some frequency where we think it is working Ok), you should see a ramp which goes from 0Hz shift to 5.5Hz shift,

I've done the ramp test. Results are here: http://groups.yahoo.com/group/QRPLabs/files/ANDY%20FTD%20FAULT%20TESTS/ It only confirms my previous findings :-( 1) At one chosen frequency in 28Mhz I

On 19/05/2013 00:58, Hans Summers wrote: > Many thanks for all your efforts in helping to collect evidence to track down this problem. I know it might be a little frustrating but thanks for

I have my grabber monitoring my 28mhz wspr output. www.qsl.net/gj7rwt/gj7rwthomepage.html At 28mhz I seem to have 9hz shift. 73's de Andy GJ7RWT ------------------------------

Hi Eddie Many thanks for all your efforts in helping to collect evidence to track down this problem. I know it might be a little frustrating but thanks for persisting! I suspect that there might be

Hi Andy You can get a pure unmodulated carrier by setting FSK (Hz) to 0 and using FSKCW mode with any message. Ok, I will see if there is space! 73 Hans G0UPL

Further update on this problem. G0FTD seems to have intermittent thin WSPR data trace and no de-codes on 28MHz but has seen a decode or 2 of his own signal after fiddling. My unit is absolutely

Thanks Philip Glad yours works on 28MHz, knowing that you use outboard LPF was an influence for my test without the Output FET powered in case there was feedback. Your report puts us back into

Sounds great Hans. Thanks for all your work, service and offering these kits at very reasonable prices. Cant wait to get my U2 built. 72, Chris KQ2RP

Did a couple of hours test on WSPR 28MHz earlier Got a few spots which considering the band conditions and my Windom's reluctance to tune on 10 meters was a result.. The PA FET gets hot on this

Hi Hans I tried various setting of the calibration, clutching at straws again, Andy FTDbhas negative values ie. 124,999,xxx mine is 125,000,555 there was no improvement in the narrow 3 Unit WSPR

Ok Hans. I don't think my efforts here will be terribly helpful. I made the circuit (ugly style) and I have a problem with it. It had no efect. Listening with a walkman earphone, I can hear the

Yep. Odd thing is I decided to put the rig live on 10m and the trace went funny. So it wasn;t the DDS ref afterall then. Just plonked it on 30m now. Whaddya know - I can see all 4 bit streams for the

I've had the U2 kit working well on 20m WSPR (but without the GPS which still doesn't work here?). The kit still only has a single FET at 5v as the PA and the antenna is a "loop" made

Odd. As such calibrating will / should do nothing to the signal data as long as you are in the WSPR window which you can see for yourself anyway. The GPS does it spot on anyway. OK test in my mind,

Oh no, not another gong ;-) I've just had a thought to recheck my 125Mhz DDS clock frequency. I did notice a shift by 25Hz when I plonked the heat shieled on the DDS module but didn't think

Good idea. I have just seen / heard seen a WSPR signal on 28.126167MHz, does any one here own this signal. I could hear it clanging and banging just like my U2 on 28MHz and the signal did not

Ah thank you Sir Foad I was just perfecting the knot in this 6feet of rope I have attached to the rafters in the shack. I shall now either put it away or send it in the post to Hans. Hans, its all

I forgot to add that the 28Mhz trace appears to be only about 2 - 2.5Hz bandwidth on Spectran. 73 de Andy

I've retitled this thread, since to the best of my knowledge there is no longer an issue with the PA on 28Mhz once the DDS pot is given a little tweak. Now I've done some tests on WSPR. 18Mhz: Using